Product Description
PURITY™ FG is a premium food-grade heat transfer fluid engineered specifically for food processing, pharmaceutical, and beverage manufacturing operations where incidental food contact may occur. Manufactured by Petro-Canada, this NSF HT-1 registered fluid starts with 99.9% pure base oils produced using a patented HT purity process—crystal-clear fluids free of impurities that can hinder performance or compromise food safety. Fortified with specially selected additives developed through more than 25 years of formulating expertise, PURITY™ FG delivers outstanding resistance to both thermal and oxidative degradation, maintaining its autoignition temperature throughout 56-day thermal stability testing at 316°C—three times longer than leading specialty fluids and more than 20% longer than major synthetic competitors. Operating continuously at bulk temperatures up to 326°C (620°F), this fluid provides high thermal efficiency while meeting the most stringent food safety standards, including FDA 21 CFR 178.3570 compliance, USDA H1 acceptance, CFIA approval, and Kosher/Pareve certification.
- NSF HT-1 Food Grade Registered: Meets the highest industry purity standards for incidental food contact; fully approved for use in and around food processing areas.
- Superior Thermal Stability: Maintains autoignition temperature throughout extended thermal stress testing—outperforming both paraffinic and PAO synthetic competitive fluids.
- Outstanding Oxidation Resistance: Significantly stronger resistance to oxidative breakdown than leading food-grade fluids, extending service life in systems with unavoidable air exposure.
- HACCP & GMP Compatible: Fits seamlessly into Hazard Analysis Critical Control Point and Good Manufacturing Practice food safety programs.
Applications
Food Processing Plants
Pharmaceutical Manufacturing
Beverage Production
Central Cooking Facilities
Commercial Kitchens
Edible Oil Deodorizing
Deep Frying Oil Heating
Food Product Drying
Heating Baths
Food Packaging Manufacturing
Plastic Bottle Production
Food Container Manufacturing
Food Film Production
Confectionery Processing
Dairy Processing
Bakery Equipment
Benefits
NSF HT-1 Registered
FDA 21 CFR 178.3570 Compliant
USDA H1 Accepted
CFIA Approved
Kosher & Pareve Certified
Extended Fluid Life
Superior Thermal Stability
Excellent Oxidation Resistance
Low Solids & Resin Formation
Low Vapor Pressure
Natural Lubricity
Virtually Odorless
Non-Hazardous
Product Availability
5 Gal (20 L)
55 Gal Drum (200 L)
Bulk (Totes / Tankers)
Product Data
| Property | Value |
| Appearance | Crystal Clear |
| Composition | Hydrocracked Mineral Oil + Additives |
| Base Oil Purity | 99.9% Pure HT Process |
| Food Grade Registration | NSF HT-1 |
| Max Bulk Operating Temperature | 326°C (620°F) |
| Max Film Temperature | 343°C (650°F) |
| Pour Point (ASTM D97) | -18°C (0°F) |
| Flash Point, COC (ASTM D92) | 209°C (408°F) |
| Fire Point (ASTM D92) | 236°C (457°F) |
| Autoignition Temperature (ASTM E659) | 354°C (669°F) |
| Kinematic Viscosity @ 40°C (ASTM D445) | 35.6 cSt |
| Kinematic Viscosity @ 100°C | 6.0 cSt |
| Kinematic Viscosity @ 316°C | 0.72 cSt |
| Density @ 15°C | 853 kg/m³ (53.3 lb/ft³) |
| Density @ 316°C | 651 kg/m³ (40.6 lb/ft³) |
| Thermal Conductivity @ 15°C | 0.138 W/m·K |
| Thermal Conductivity @ 316°C | 0.121 W/m·K |
| Heat Capacity @ 15°C | 1.87 kJ/kg·K (0.446 Btu/lb·°F) |
| Heat Capacity @ 316°C | 2.88 kJ/kg·K (0.688 Btu/lb·°F) |
| Vapor Pressure @ 260°C | 3.01 kPa (0.437 psia) |
| Vapor Pressure @ 316°C | 14.27 kPa (2.07 psia) |
| Coefficient of Thermal Expansion | 0.0919%/°C (0.0511%/°F) |
| Distillation Range 10% (ASTM D2887) | 382°C (720°F) |
| Distillation Range 90% (ASTM D2887) | 498°C (928°F) |
Regulatory Certifications
| Certification | Status |
| NSF HT-1 | Registered |
| FDA 21 CFR 178.3570 | Compliant |
| USDA H1 | Accepted |
| CFIA (Canadian Food Inspection Agency) | Approved |
| Kosher Certification (Star K) | Certified Kosher & Pareve |
| OSHA Hazardous Classification | Not Controlled |
| WHMIS Classification | Not Controlled |
| EU DSD/DSP Classification | Not Classified |
Note: While PURITY™ FG is highly resistant to oxidative breakdown, excessive air and water contamination can still reduce thermal efficiency and shorten fluid life over time. Where practical, inert gas blanketing of the expansion tank is recommended to guard against prolonged air and moisture exposure and maximize fluid service life. To ensure optimal system efficiency and fluid longevity, Petro-Canada recommends thorough system flushing with PURITY™ FG WO white mineral oil (for food processing applications) prior to charging with fresh PURITY™ FG—particularly when converting from other fluid types or when residual contamination is present. Avoid operating conditions that can accelerate fluid degradation, including thermal shocking from rapid temperature increases, hot spots on heating coils, and continuous operation above the maximum recommended bulk temperature. Annual fluid analysis is recommended to monitor fluid condition. PURITY™ FG’s low vapor pressure minimizes leakage from control valves and pipe flanges, and its natural lubricating properties help extend the service life of circulating pumps and rotating equipment. The fluid is virtually odorless and non-hazardous, requiring no special handling permits for shipment or storage. For systems requiring flushing in food processing environments, use only NSF HT-1 registered flushing fluids to maintain food-grade compliance throughout the maintenance process.